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等效力控制方法在拟动力试验中的应用

, PP. 79-85

Keywords: 拟动力试验,等效力控制方法,比例-积分控制器,稳态误差,负刚度

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Abstract:

为了避免用复杂的迭代求解拟动力试验隐式逐步积分方法的非线性运动方程,作者提出了一种用反馈控制求解的方法―等效力控制方法。这篇文章首先介绍等效力控制方法的原理;然后通过数值模拟和试验验证此方法的有效性。数值模拟和试验的结果都表明,当选用合理的等效力控制器参数时,此方法可以取得非常好的稳定性和精度。数值模拟的结果还表明尽管等效力控制方法是以力作为反馈控制的对象,此方法能有效完成对具有负刚度试件的加载。

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